From patchwork Sun May 8 17:57:03 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 12842675 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 03B74C4707E for ; Sun, 8 May 2022 19:17:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231738AbiEHTTN (ORCPT ); Sun, 8 May 2022 15:19:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41052 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243412AbiEHSD0 (ORCPT ); Sun, 8 May 2022 14:03:26 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6D059558C for ; Sun, 8 May 2022 10:59:35 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 095346128D for ; Sun, 8 May 2022 17:59:35 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 020ADC385AF; Sun, 8 May 2022 17:59:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1652032774; bh=O6PsoMXFGTlJVbv/rjjs12zVq13UrwD+1Q7rX1fAjv8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=sxQWAdj9c0CmMdYwSbWxBUiIUdjdFCB/wWMnI+VnWLeMixPcJAH35fOy2SPmscyAm q2R8qjH1Gs9nlzZtSNc+tPBmSsVFzTLZJqrDqpT9pAiRgP4d46bfEdvKSZjmRN5hmh y2uu5qSXThGEr/ajvo+0R1Ze+dkiaysJ25uZw2kDzhr5Gvi4hDns5PI3KrHQKniseV 8WulihnrkANF3hHZmR5YDGBhpG4eaw16ppg9I2C8Op2ZR8ORgwy4BPsrmtn9U4fVvp feUv4Ni0FQMU8PLghXmBRCLrZ2UxdX77v23zFZfxAJ3KkLNzgVCjsrXmOh7lZxviVB ck3kTyQp5RmXQ== From: Jonathan Cameron To: linux-iio@vger.kernel.org Cc: Alexandru Lazar , Akinobu Mita , Alexandru Tachici , Antoniu Miclaus , Charles-Antoine Couret , Cosmin Tanislav , David Lechner , Ivan Mikhaylov , Jacopo Mondi , Jean-Baptiste Maneyrol , Lars-Peter Clausen , Marcelo Schmitt , =?utf-8?q?M=C3=A5rten_Lindahl?= , Matt Ranostay , Matt Ranostay , Michael Hennerich , Michael Welling , Mugilraj Dhavachelvan , Navin Sankar Velliangiri , =?utf-8?q?Nuno_S=C3=A1?= , Paul Cercueil , Phil Reid , Puranjay Mohan , Ricardo Ribalda , Robert Jones , Rui Miguel Silva , Sean Nyekjaer , Tomas Melin , Tomislav Denis , =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= , Jonathan Cameron Subject: [PATCH v2 83/92] iio: potentiometer: mcp41010: Fix alignment for DMA safety Date: Sun, 8 May 2022 18:57:03 +0100 Message-Id: <20220508175712.647246-84-jic23@kernel.org> X-Mailer: git-send-email 2.36.0 In-Reply-To: <20220508175712.647246-1-jic23@kernel.org> References: <20220508175712.647246-1-jic23@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org From: Jonathan Cameron ____cacheline_aligned is an insufficient guarantee for non-coherent DMA on platforms with 128 byte cachelines above L1. Switch to the updated IIO_DMA_MINALIGN definition. Fixes: 092cb71a604e ("iio: potentiometer: Add driver for Microchip MCP41xxx/42xxx") Signed-off-by: Jonathan Cameron Acked-by: Nuno Sá --- drivers/iio/potentiometer/mcp41010.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/potentiometer/mcp41010.c b/drivers/iio/potentiometer/mcp41010.c index 30a4594d4e11..2b73c7540209 100644 --- a/drivers/iio/potentiometer/mcp41010.c +++ b/drivers/iio/potentiometer/mcp41010.c @@ -60,7 +60,7 @@ struct mcp41010_data { const struct mcp41010_cfg *cfg; struct mutex lock; /* Protect write sequences */ unsigned int value[MCP41010_MAX_WIPERS]; /* Cache wiper values */ - u8 buf[2] ____cacheline_aligned; + u8 buf[2] __aligned(IIO_DMA_MINALIGN); }; #define MCP41010_CHANNEL(ch) { \